magarena/release/Magarena/scripts/Firefist_Striker.groovy

[
    new MagicBattalionTrigger() {
        @Override
        public MagicEvent executeTrigger(
                final MagicGame game,
                final MagicPermanent permanent,
                final MagicPermanent attacker) {
            return new MagicEvent(
                permanent,
                MagicTargetChoice.NEG_TARGET_CREATURE,
                new MagicNoCombatTargetPicker(false,true,false),
                this,
                "Target creature\$ can't block this turn."
            );
        }
        @Override
        public void executeEvent(
                final MagicGame game,
                final MagicEvent event) {
            event.processTargetPermanent(game,new MagicPermanentAction() {
                public void doAction(final MagicPermanent creature) {
                    game.doAction(new MagicSetAbilityAction(creature,MagicAbility.CannotBlock));
                }
            });
        }
    }
]